IPC Main Group
E04B 7/00 Roofs; Roof construction with regard to insulation
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- BUILDING
- Subclass:
- GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
Related Keywords
ROOF(S) structures of buildingsSPIRESSTEEPLES
7 direct subcodes
Child Classifications
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- E04B 7/02 with plane sloping surfaces, e.g. saddle roofs
- E04B 7/08 Vaulted roofs
- E04B 7/12 formed in bays, e.g. sawtooth roofs
- E04B 7/14 Suspended roofs
- E04B 7/16 Roof structures with movable roof parts
- E04B 7/18 Special structures in or on roofs, e.g. dormer windows
- E04B 7/2 Roofs consisting of self-supporting slabs, e.g. able to be loaded
Top Applicants
Top 10 applicants by patent filingsfor class E04, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION 6,575
- ZHEJIANG YASHA DECORATION COMPANY 4,488
- SGCC(STATE GRID CORPORATION OF CHINA) 4,427
- CHINA CONSTRUCTION SECOND ENGINEERING BUREAU 4,352
- CHINA MCC17 GROUP COMPANY 3,122
- GOLD MANTIS FINE DECORATION TECHNOLOGY (SUZHOU) COMPANY 2,605
- SHENYANG JIANZHU UNIVERSITY 2,420
- CHINA CONSTRUCTION SEVENTH ENGINEERING DIVISION COMPANY 2,284
- CHINA CONSTRUCTION FIFTH ENGINEERING DIVISION CORPORATION 2,008
- CHINA CONSTRUCTION FIRST BUILDING (GROUP) CORPORATION 1,967